Electric-lamp socket.



No. 741,924. PATENTED-OGT. 20, 1903.

M. NORDEN.

ELECTRIC LAMP SOCKET.

APPLIOATION FILED JAN. 12. 1903.

N0 MODEL.

WI NEEE llnirnn diverse Patented October so, 1903.

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MORTIMER NORDEN, OF NEW YORK, N. Y., ASSEGNOR TO THE NORDEN- BITTNEE ELECTRIC COMPANY, OF NEW YORK, N. Y., A (JORPORATION OF NEW YORK.

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SPECIFIGATIQIEE forming part of Letters Patent No. 741,924, datedv October 20, 1903.

Application filed January 12, l903. Serial No. 138.605. (No model.)

ing is a specification.

My invention relates to sockets for incandescent electric lamps, especially those ein' ployod in surface-or suspended wiring; and the object of my invention is not only to he able to make metallic and electrical contact and complete the circuit with line-wires, but

to break the said contact and circuit even af-- ter the parts are connected and the electric lamp is in place and without the risk of coir tact with live conductors.

In the device of my invention a cup, of porcelain or other similar vitrified material, is made with a flange continuing the approciable diapieter thereof, and this is perforated at opposi'e points, so as to receive pointed screws,wl1ich occupy said perforations and are movable longitudinally in threaded sleeves forming electrical connections with the socket and which screws come in line with recesses adapted to receive and through which pass the conducting-wires the pointed ends of said screws being adapted to he forced through the insulated-material covering of the corn doctors, so that the points come into forceful. metallic contact with the conductors in male lug electrical connection. -"ihese screws can be removed and the circuit hroltcn or the cir-' cuitcan be established without moving? the electric lampor the. necessity of separating" the socket from the base, which is fastened to the support.

In the drawings, Figure 1 is a vertical sec tion representingrnyinventiou. Fig. 2 is a plan of the same. Fig". 3 is an inverted plan of the lower portion of the cup.

n represents the cup, of porcelain or other suitable insulating or vitrified materiahwhich .is circular in form to receive the base of the lamp and is provided with a flange a, which continues the appreciable diameter of the cup portion.

l is the base, also of suitable insulating or refractory material and of similar material to the cup at and its flange 0.. This base is to be secured to a support in any desired manner, said support usually being a ceiling, side wall or molded structure. cup a there is a hole Zand in the cente'rot the base a hole 3 for receiving the connecting-bolt 4s employed to secure the cup and its flange-to the base. the base and the under surface of the cup audits flange are substantially flat except for a pair of parallel recesses5 in the under sur face of the cup and flange and a coinciding pair ofparallel recesses 6 in the loase.

The conductors c (1, usually of a main line, are received in the said recesses, which, by the way, are preferably of slightly h form, so as to suitably engage said conductors between them, the bolt inot only holding the cup and flange to the base, but clamping the conductors between the parts.

6 represents the sheet-metal screw-socket for the lamp. This is of usual form and is provided with a'flat ear portion e The plate f, of sheet metal, occupies a position at the base ofothe socket in the cup, the same having'an aperture concentric with. the hole 2, the said plate lying radially in the base of the cup.

I provide plates 71 and 2', lying against the under surface of the cup a and its flanged" and also occupying radial positions. These plates are held in position in part by the screws '7 and 8, the screw 7 connecting the plate h with the ear portion e of the screwsocket and passing vertically through the base of the cup at and the screw 8 also pass ing vertically through the base of the cup a The upper surface ofln the base of the and connecting the plate f with the plate 6,

said screws 7 and 8 not only forming mechan ical but electrical connections between the parts.

The plates h and z are provided with threaded sleeves h 01', and said plates are re:-

at one end,and their position at the other end is fixed by the screws 7 and 8, hereinbefore described. 4

From the illustration and foregoing description itwill be apparent that the screwsocket, the plate f, the screws 7 and 8, the

plates h and t, with their sockets h and i; and the screws 7; It all maintain a predetermined relation to the cup a and the flange a,

that these parts are connected to' the base I) by the bolt 4, and that the screws 10 k can be operated without removing the incandescent electric lam por obtaining access to the socket receiving the same, but are operated outside and independentof' said lamp and are in their rotation forced through the insulating-covering of the conductors to metallic and electrical contactwith the embedded conductorwires, completing the electric circuit. \Vhen the lamp is in position, the circuit is from the conductor .0, by screw it, sleeve 72/, plate it,

screw 7 to the screw-socket e and to the lamp and from the lamp by the plate f, by the screw 8', the plate 1', the sleeve 11, screw k to the conductor d.

I do not limit myself to the character of the socket e, as the same maybe of any form employed in the art.

I claim as my invention- 1. An electric-lamp socket comprising a base of porcelain or other similar vitrified material, a cup and flangetherefor of the same material, the flange surrounding and increasmaterial, the flange surrounding and increasing the diameter of the cup portion, and having perforations at opposite points through said flange outside of the cup, the base and the under surface of the cup and flange having pairs of parallel recesses to receive the electric conductors, metal sleeves in the perforations of the cup-flange,and pointed screws in said sleeves, a sheet-metal socket within the cup, devices extending from the said sleeves and forming mechanical and electrical connections with the socket and devices of the cup, and means for holding the cup and the base together with force to grasp the electric conductors. 1

3. An electric-lamp socket, comprising a base of porcelain or other similar vitrified material, a cup and flange portion of corresponding material, the flange continuing the appreciable diameter of the-cup, therebeing perforations through the flange at opposite points outside the cup and pairs. of parallel recesses in the upper surface of the base and the under surface of the cup and flange to receive the conductors, a sheet-metal socket in the cup and a plate in the base of the cup, plates lying against the under surface of the cup and flange, screws connecting the same with the socket and plate of the cup, and devices forming prolongations of said plates and accessible in the perforations of the on p-flange for forming mechanical and electrical contact .with theconductors, and a bolt for holding the base and cup portion together with force to clamp the conductors in'position.

4. An electric-lamp socket, comprising a base of porcelain or other similar vitrified material, a cup and flange portion of corresponding material, the flange continuing the appreciable diameter of the cup, forations through the flange at opposite points outside the cup, and pairs of parallel recesses in the upper surface of the base and the under surface of the cup and flange to receive the conductors, a sheet-metal socket in-the cup, and a plate in the base of the cup, plates lying against the under surface of the cup and flange, screws connecting the same with the socket and plate of the cup, 'interiorlythreaded sleeves formed with the plates upon the under side of the cup setting over the electric conductors and received in part in the perforations of the cup-flange and pointed screws also in said perforations and in the threaded sleeves accessible from outside of the cup and by which the covering of the conductors is penetrated to form mechanical and electrical connection, and a bolt for connect-' there being pering the base and cup and so clamping the con- 7 ductorsjn position.

Signed by me this 5th day of January, 1903.

. MORTIMER NORDEN. Witnesses:

GEo. T. PINCKNEY,

iERTHA M. AI.LEN. 

